Question about 2001 BMW 5 Series

3 Answers

2001 BMW 540i

In the morning after my car sits all night when I start it up there is a loud rattling sound coming from the engine compartment as well the engine fan is extremely loud

Posted by on


3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Hi there,

I have the same car and though I haven't had this problem myself, I think there is a good chance you fan clutch is bad on your main, engine driven mechanical fan.

To see if this is the problem, do this:

- With the car cold and turned off, pop the hood and try to spin the mechanical fan by hand. If you can't, the fan clutch is defintely bad.

- If that is inconclusive, try this *VERY CAREFULLY*: Get a rolled up newspaper, start the car, and insert the newspaper into the fan while it is spinning. if it stops the fan, the clutch is likely OK. if it doesn't, again, the clutch is likely bad.

Some tips non replacing the clutch if it's bad:

1) The fan clutch is held on with a large bolt with REVERSE threads. I don't know the mm siuze, but my very large crescent works fine on it.

2) It may be hard to remove as the clutch may allow it to spin when you put torque on the nut. Many people have success by using a large mallet and striking the wrench twice to dislodge it. Others use either a long screwdriver to wedge between the nuts to hodl it or 2 10mm box end wrenches on 2 of the pulley nuts to keep it still. this is hard to explain but will make sense once you see it.

*** There is also a bmw tool to hold the pulley still, but it is expensive and not common, so i am assuming you don't have one.

Hope this helps.

Posted on Sep 11, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

How do I have a copy of user manual for BMW520i model 2001?

Posted on May 16, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 2,035 Answers

You need to get it serviced as engine may be blocked an the fan may be caused due the poor AC ,Please get it serviced ASAP.

Posted on May 14, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

98 bmw 540i ticks loudly when you first start it up them gets quiter

Sounds like a lifter is bleeding down and when the car is started it is pumping back up because the oil pump is putting pressure in the system. I would have someone check for a weak lifter or adjust the rocker arm clearance.

Jun 18, 2017 | BMW Cars & Trucks

1 Answer

Waht would cause a loud rattleing noise in my engine?

get it into a garage before something really goes bad then you'll be looking for a new beamer

Apr 29, 2014 | BMW 325 Cars & Trucks

1 Answer

Lost oil pressure in a 1999 540i and timing chain noise

from the book the oil pump is driven by a chain from the crankshaft. It is very possible that the oil pump has come loose and thrown/broken the pump chain. It will require a sump removal to check it out. recheck the oil level as what you read may have been a froth level . there is no reason for extra oil unless it was overfilled to start with or there is water contamination ( white /grey oil)

Nov 29, 2013 | 1997 BMW 318

1 Answer

Bmw 540I Problems

If the radio lights up then there must be power coming through. I very much doubt that it is fuse related- it sounds to me like a problem with the radio itself.

Nov 11, 2013 | Cars & Trucks

1 Answer

I have a 2008 Dodge Durango, 94k miles. Every time I start the truck after it sitting for a while (in the mornings or when I am leaving from work), it has a loud ticking noise and the engine sounds really...

Sounds like the valve lifters are taking longer than normal to pump up with pressure. Getting the motor cleaned out and de-sludged would help. also use good quality oil after the cleaning.

Nov 01, 2013 | Dodge Durango Cars & Trucks

1 Answer

I have a 2001 Subaru Forester. When the car is cold (not the engine); so in the winter months when I start the car there is a loud rattling/knocking in the engine area. Once the car heats up, it goes away....

Ever had your wedding band on during the winter outside and it wants to fall off ,same thing for cars metal expands and could cause some unwanted noise from heat shields and such thing is to find it and eliminate this sound 1 morning you must find this sound and where it is so you do not confuse that sound with an actual rattle inside the block so please find and fix this problem you will thank me later.
Thanks in advance please remember to rate and leave testimonial this is how we get our milestones on FixYa and please remember we are volunteers here we receive no payment and work jobs too so answers may not come as fast as you like please be patient with us. Thanks for using us the FixYa team.

Sep 25, 2013 | 2001 Subaru Forester

2 Answers

What is the cause of rattling noise in the engine compartment? Nothing shows on the dashboard.

Maybe a Tool that was left in the Engine Compartment? A Heat Shield that has come loose?

What were you doing JUST BEFORE the noise started? Did someone work on the car? Have you checked the Oil Level?

Apr 08, 2013 | 2007 Toyota Highlander

1 Answer

2001 Volvo S60 engine noise

bring the car back to the trans shop. it is possible there is a bolt hitting something

May 13, 2010 | 2001 Volvo S60

2 Answers

Hi i got problem with my bmw e39 540 i auto .when engine warm it changes gear late and got a whisle noise .it only does when engine warmed and if i turn engine of and wait for 20 min or less it gets normal...

Look for vacuum leaks, late shifting can be a result of lower than normal manifold vacuum, look for dislodged or broken hoses.

My thought is when you find the whistling, you will have the solution...


Sep 18, 2009 | 2001 BMW 5 Series

Not finding what you are looking for?
2001 BMW 5 Series Logo

723 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Anthony Jones
Anthony Jones

Level 2 Expert

128 Answers


Level 2 Expert

254 Answers


Level 2 Expert

281 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides